/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package trivia;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import trivia.subject.AlgebraLinearFunctions;
import trivia.subject.HistoryGreekGods;

import trivia.gui.SubjectList;
import trivia.gui.SubjectMenu;
import trivia.gui.TestController;
import trivia.gui.PracticeController;

/**
 * @author mourawi
 */
public class TriviaMIDlet extends MIDlet implements CommandListener {

    private boolean midletPaused = false;

    private Subjects subjects;

    private Subject selectedSubject;

    private SubjectList subjectList;

    private SubjectMenu subjectMenu;

    private TestController testController;

    private PracticeController practiceController;

    //<editor-fold defaultstate="collapsed" desc=" Generated Fields ">//GEN-BEGIN:|fields|0|
    //</editor-fold>//GEN-END:|fields|0|

    /**
     * The HelloMIDlet constructor.
     */
    public TriviaMIDlet() {
        subjects = new Subjects();
        subjects.addSubject(new HistoryGreekGods());
        subjects.addSubject(new AlgebraLinearFunctions());
        selectedSubject = null;
    }

    //<editor-fold defaultstate="collapsed" desc=" Generated Methods ">//GEN-BEGIN:|methods|0|
    //</editor-fold>//GEN-END:|methods|0|

    //<editor-fold defaultstate="collapsed" desc=" Generated Method: initialize ">//GEN-BEGIN:|0-initialize|0|0-preInitialize
    /**
     * Initilizes the application.
     * It is called only once when the MIDlet is started. The method is called before the <code>startMIDlet</code> method.
     */
    private void initialize() {//GEN-END:|0-initialize|0|0-preInitialize
        // write pre-initialize user code here
//GEN-LINE:|0-initialize|1|0-postInitialize
        // write post-initialize user code here

        subjectList = new SubjectList(subjects);
        subjectList.setCommandListener(this);

        subjectMenu = new SubjectMenu();
        subjectMenu.setCommandListener(this);

        testController = new TestController(this);
        practiceController = new PracticeController(this);
    }//GEN-BEGIN:|0-initialize|2|
    //</editor-fold>//GEN-END:|0-initialize|2|

    //<editor-fold defaultstate="collapsed" desc=" Generated Method: startMIDlet ">//GEN-BEGIN:|3-startMIDlet|0|3-preAction
    /**
     * Performs an action assigned to the Mobile Device - MIDlet Started point.
     */
    public void startMIDlet() {//GEN-END:|3-startMIDlet|0|3-preAction
        // write pre-action user code here
//GEN-LINE:|3-startMIDlet|1|3-postAction
        // write post-action user code here
        switchDisplayable(null, subjectList);
    }//GEN-BEGIN:|3-startMIDlet|2|
    //</editor-fold>//GEN-END:|3-startMIDlet|2|

    //<editor-fold defaultstate="collapsed" desc=" Generated Method: resumeMIDlet ">//GEN-BEGIN:|4-resumeMIDlet|0|4-preAction
    /**
     * Performs an action assigned to the Mobile Device - MIDlet Resumed point.
     */
    public void resumeMIDlet() {//GEN-END:|4-resumeMIDlet|0|4-preAction
        // write pre-action user code here
//GEN-LINE:|4-resumeMIDlet|1|4-postAction
        // write post-action user code here
        switchDisplayable(null, subjectList);
    }//GEN-BEGIN:|4-resumeMIDlet|2|
    //</editor-fold>//GEN-END:|4-resumeMIDlet|2|

    //<editor-fold defaultstate="collapsed" desc=" Generated Method: switchDisplayable ">//GEN-BEGIN:|5-switchDisplayable|0|5-preSwitch
    /**
     * Switches a current displayable in a display. The <code>display</code> instance is taken from <code>getDisplay</code> method. This method is used by all actions in the design for switching displayable.
     * @param alert the Alert which is temporarily set to the display; if <code>null</code>, then <code>nextDisplayable</code> is set immediately
     * @param nextDisplayable the Displayable to be set
     */
    public void switchDisplayable(Alert alert, Displayable nextDisplayable) {//GEN-END:|5-switchDisplayable|0|5-preSwitch
        // write pre-switch user code here
        Display display = getDisplay();//GEN-BEGIN:|5-switchDisplayable|1|5-postSwitch
        if (alert == null) {
            display.setCurrent(nextDisplayable);
        } else {
            display.setCurrent(alert, nextDisplayable);
        }//GEN-END:|5-switchDisplayable|1|5-postSwitch
        // write post-switch user code here
    }//GEN-BEGIN:|5-switchDisplayable|2|
    //</editor-fold>//GEN-END:|5-switchDisplayable|2|
  

    public void commandAction(Command command, Displayable displayable) {
        if(displayable == subjectList) {
            if(command.getCommandType() == Command.OK) {
                selectedSubject = subjectList.getSelectedSubject();
                switchDisplayable(null,subjectMenu);
            } else if (command.getCommandType() == Command.EXIT) {
                exitMIDlet();
            }
        } else if(displayable == subjectMenu) {
            if(command.getCommandType() == Command.OK) {
                if(subjectMenu.getSelectedOption() == SubjectMenu.TEST) {
                    testController.start(selectedSubject);
                } else if(subjectMenu.getSelectedOption() == SubjectMenu.PRACTICE) {
                    practiceController.start(selectedSubject);
                }
            } else if (command.getCommandType() == Command.CANCEL) {
                startOver();
            }
        } 
    }


    public void startOver() {
        switchDisplayable(null,subjectList);
    }


    /**
     * Returns a display instance.
     * @return the display instance.
     */
    public Display getDisplay () {
        return Display.getDisplay(this);
    }

    /**
     * Exits MIDlet.
     */
    public void exitMIDlet() {
        switchDisplayable (null, null);
        destroyApp(true);
        notifyDestroyed();
    }

    /**
     * Called when MIDlet is started.
     * Checks whether the MIDlet have been already started and initialize/starts or resumes the MIDlet.
     */
    public void startApp() {
        if (midletPaused) {
            resumeMIDlet ();
        } else {
            initialize ();
            startMIDlet ();
        }
        midletPaused = false;
    }

    /**
     * Called when MIDlet is paused.
     */
    public void pauseApp() {
        midletPaused = true;
    }

    /**
     * Called to signal the MIDlet to terminate.
     * @param unconditional if true, then the MIDlet has to be unconditionally terminated and all resources has to be released.
     */
    public void destroyApp(boolean unconditional) {
    }

}
